EP 0588495 A1 19940323 - A spark plug and a method of making the same.
Title (en)
A spark plug and a method of making the same.
Title (de)
Zündkerze und sein Herstellungsverfahren.
Title (fr)
Bougie d'allumage et sa méthode de fabrication.
Publication
Application
Priority
JP 22004492 A 19920819
Abstract (en)
A spark plug includes a cylindrical metallic shell having an insulator in which a center electrode is placed, a front end of which somewhat extends beyond the insulator; a noble metal portion is boded to an outer side wall of the front end of the center electrode by means of laser beams so as to form a spark gap between the noble metal portion and a ground electrode which is depended from the metallic shell. The noble metal portion has a molten alloy layer in which the center electrode is melted into the noble metal portion, and a diffused alloy layer in which the noble metal portion is diffused into the center electrode. <IMAGE>
IPC 1-7
IPC 8 full level
H01T 13/20 (2006.01); H01T 13/39 (2006.01); H01T 21/02 (2006.01)
CPC (source: EP US)
H01T 13/39 (2013.01 - EP US); H01T 21/02 (2013.01 - EP US)
Citation (search report)
- [A] DE 2433683 A1 19760205 - SICK OPTIK ELEKTRONIK ERWIN & JP H06231797 B
- [A] WO 8901717 A1 19890223 - BOSCH GMBH ROBERT [DE]
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0588495 A1 19940323; EP 0588495 B1 19971022; DE 69314738 D1 19971127; DE 69314738 T2 19980219; JP 3425973 B2 20030714; JP H0668955 A 19940311; US 5478265 A 19951226; US 5497045 A 19960305
DOCDB simple family (application)
EP 93306484 A 19930817; DE 69314738 T 19930817; JP 22004492 A 19920819; US 10561193 A 19930813; US 39102295 A 19950221